Tape translator



M L. NELSQN ET AL, 2,087,674

TAPE TRANSLATOR Filed March 25, 1934 7 Sh i; 1

- JNVENTORS- MART/N L NELSON LEHW dam/$70M July 20, 11937- M. L. NELSON ET AL TAPE TRANSLATOR Filed March 23, 1954.

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July 20, 1937.

M. L. NELSQN ET AL TAPE TRANSLATOR Filed March 23, 1934 S IGNS aze O 00oooooooocoocoouooooooooo O 00 O 7 Sheets-Sheet 5 DISPLAY Law / /a rare 29/ JNVENTORS- MARTM/ L. Naso/v LE/TH (Jo/ms TON July 20, 1937. M. n... NELSON ET AL TAPE TRANSLATOR Filed March 23, 1934 7 Sheets-Sheet 6 TORS- Mmrm/ L. NELSON LE/TH (/OH/VSTON shove mentioned systems.

Patented Jul 20, 1937 8 1 UNITED STATES regress OFFICE TAPE TRAN SLATKIR Martin L. Nelson, Park Ridge, and Keith Nolanston, Chicago, 11L, asslgnors to Associated Elec trio Laboratories, Inc., Ghlcago, 11L, 9. corpo= ration of Delaware Application March 23, 193%, Qerial No. Hittite '7 Claims. (@L ill-35%) This invention relates to a tape translator or Elli. shows a cross-section of the contact transmitter for mechanically decoding coded perspring assernhly. iorations in a tape to make mechanical selections Rig". 8 shows the detail mechanisms by which in accordance with the coded perforations in the the reeler pins and code bars are controlled.

tepe. v Fig. 9 shows por ion of the perforated tape ior 5 A translator of this type may be used in difiercontrolling the transistor. ent types of systems such as controlling an elec his. lll shows some of the pwh bars oi the trio sign to display the latest news bulletins translator with their associated spring combinefor advertising purposes and for contmllirig dittlons for controllin certain sign circuits. A 10 ferent types of recording machines such as an one? stop ior controlling the tronslo electrically operated Powers perforating punch letor stop magnet is also shown. or e Powers tabulator. 11 s ows astep-ls-y-step sequence switch The object of the present invention is to proad portion the circuits for controlling vlde an improved tspe translator for use in the 1. l2 shows 9. transformer and the A. if. relays l5 One of the novel and essential features of the r n frame or letter hos. invention reletes to the timing of the ttlcelly shows the ormnge= actions of the translator together with its me= e sections of one of the sign chemical construction whereby practically com irenros or letter horses. plete cycle period of operation may he for how detail to Me's. l to 8, l s 2o operating purposes without interfering with the a ersl description oi the tape translator will selecting period which likewise consumes the li s given The Gem Ell-flit 0f the p t msgr ater part of e cycle period of operation. let or rotated by means of e. small motor and a Another feature relates to the manner in which m s ly -r d lut h. Th tr ns a perforated tape operates the mechanical letor mechsnismis controlled by cams on the cam letor to control the novel circuits of an electric and by a A star wheel feeds the tape sign for displaying words or other characters, one step with eech cycle oi operation of the com This display system is being claimed in e divi= shaft and positions the tape in its rest positions sional application S. N. 51,052 filed November 22, so that the perforations therein are directly over 1935. the leeler pim. These feeler pins have individual Other features not specifically mentioned will prices to lore-e them es n Mi but y be apparent from the following description oi are held from doing so y a bell with s n the drawings comprising Figs. 1 to 13,1nc1usive. hri e tenslom- This bell is m ed by a com o Referring now to the drawings comprising Fig the com which raises the bail and allows the 1 to s, inclusive, there is shown difierent views i r p s to press sselnst the s or to pass so and details or the tape translator, while Fig. 9 through the perf r i the ap s at d shows a portion of the tape for controlling the with. e lieelei p 18 8"- o bar latch which tape translator. Figs. 10, 11, 12, and 13 diagramis moved by the ieeler pin in case the pin extends .matically disclose circuits controlled by the tape through it Perffimlilm in the p There are 4 translator for displaying word r har t six permutstion code hers, one for each code bar on an electric ill minat d i n, latch. The ears are normally held in position Fig. 1 shows a side view of the tape translator behind 311% 60% latches by cam Wen-tea with certain parts thereof removed to mme code bar bail. when the feeler pins have moved clearly disclose the mechanism their full distance, the code bar hail moves so Fig 2 shows a top View. asao pbermit the mgivementgfghetliode biexgivk'il'hai 45 coe arsareeler 1e y ern u 3 Shows an end View with the tape cowl latches or move s. definite distance dependent in an upright position.

. L h "i iri Fig. 4 shows the stop magnet and clutch mech-= gt lg gig: gg fig ggg gi {fa al so anism for operatively connecting the cam shaft that for each given code. combination certain 50 7 to the drive Shaft notches in all hers will be in alinement. Direct- 6, and 7 are Partial cross Sections m 1y above these notches are selector bars and push more clearly show the operations of the selector b t n r movement of t tt bars, push bars, code bars, and the selector bar ing controlled by their associated selector bars.

and push bar balls. The selector bars are normally held of! the code 55 Particular code has been selected and certain of the code bars have moved, the code bars will have one series of notches in alinement and the selector bar above these notches will drop into the alined notches and carry the associated push bar with it. A cam operated push bar ball then moves and engages only the push bar that dropped with the selected selector bar. The push bar bail pushes the selected push bar to close associated contact springs located at its opposite end. As

soon as the push bar bail engages the selected 7 push bar the same is held in engagement therewith and the selector bar bail may now restore the selector bars. The code bar bail now restores the code bars for a new selection while the selected push bar is being held and operated by the push bar bail.

As soon as the code bars have moved to their selecting positions, the feeler pins are restored to normal by the feeler pin bail, and the tape feed pawl is operated by a cam to position the tape for the next selection.

The base assembly of the translator comprises a base I having upright supports for mounting the various parts. Support 2, integral with base I, comprises a bearing support for the cam shaft 1 and a bearing support for the shaft I6. The cam shaft 1 is supported at its left end by the bearing support 3. Spring assemblies I40 and I are mounted on support 6 in the manner shown in Fig. 3. Upright supports 4, 5, I2I and a support similar to I2I (not shown) are provided for mounting the selector and code bar assembly on the base assembly.- A bracket 18 mounted on support 4, Figs. 1 and 3, is provided to enable the bell crank levers -15 to rotate on the pivot 16. Roller 11, rotatably mounted between the levers 15, engages the raised and lowered portions of the tape feed cam II mounted on the cam shaft 1. The cam shaft 1 has a plurality of cams thereon which operate different parts in certain timed relation with respect to its rotation. Cams 9 and 9 operate the spring assemblies I40 and HI, cam I0 controls the operation of the feeler pin bail I26, and cam I2 controls the operation of the code bar bail 93. Cam I3 engages a push bar bail cam follower comprising a U-shaped lever 89 loosely mounted on shaft I6 and having turned down edges in which the roller 90 rotates, see Figs. 1 and 5. The associated adjusting arm 91 is rigidly mounted on shaft I 6 and has an adjusting nut and screw assembly 88 which may be adjusted with respect to the lever 99 so as to rotate the shaft I6 when thehigh part of cam I3 engages roller 90. Cam I4 engages the roller 99 which is rotatably mounted between two bell crank shaped arms 91 which are rotatably mounted on the shaft I6. A lug adjusting screw is pivotally mounted at 96 between the two arms 91. Two lock nuts 93 and an adjusting nut 94 operatively connects the lug adjusting screw 95 to the lug adjusting screw 92 which is pivotally connected to the selector bar bail arm 9|. Keyed to the shaft I6 for oscillation therewith are two U- shaped arms I00 securely held by bolts IN. A

push bar I08 is rigidly secured to the bent ears of the arms I00 so that when the shaft I6 is oscillated by the cam I3 bail I08 is oscillated therewith. A spring I03 having one end extending through the support 2 and the other end extending through an adjusting nut I02 on shaft I6 is tensioned to hold the roller 99 on the'surface of cam II.

A U-shaped stop arm 23 is keyed and rigidly connected to shaft 1 (Fig. 2) and normally engages the stop armature 24 of stop magnet 25 which is fastened to the base I by means of a bracket (not shown). A pawl 22 pivoted at 25 to stoparm 23 also normally engages the stop armature 24 to disengage the catch of the pawl from the teeth 2 I of clutch 20, see Fig. 4. When the stop armature 24 is attracted by the magnet 25 the arm 23 and pawl 22 are releasedand a spring 22' draws the catch of pawl 22 into engagement with a tooth 2I on clutch 20. The clutch 20 now rotates the cam shaft 1 by means of the fiber gears I9 and I8. A small motor (not shown) drivesthe shaft I1 on which is mounted the gear l8'which is in mesh with the gear I9 on clutch 20. As long as the pawl 22 is out of engagement with the teeth 2I of clutch 20 the cam shaft 1 is not operated, but as soon as the pawl.22 engages a tooth on the clutch then the cam shaft is rotated with clutch 20.

The selector and code bar assembly comprise end pieces 00 and I09 which are secured to the upright supports 4, 5, I2I and a similar support by means of machine screws. The end pieces 90 and I09 each have holes in the L- shaped portion towards the front of the assembly- .shaft' I5 being oscillated by means of the cam I 4, roller 99, arms 91, and the adjustable link 92, 93, 94, 95 connecting the arms 91 to the arm 9| (Fig. '1). A notched bar I20 toward the rear of the assembly is secured to the pieces 30 and I09 by means of machine screws. The notches in bar I20 are large enough to allow both the selector bars H2 and push bars III tomove freely therein as more clearly shown in Figs. 5, 6, and 7. A slot extending longitudinally through the bar I20 is provided for the rod I23 which is held in place by screws I25. Each selector bar II2 has an opening through which the rod I23 extends to form a. pivot for the selector bars. A spring H4 is provided for each selector bar II2 to cause the selector bar to be held against the selector bail I01 or to rest on the code bars I I9 dependent upon the position of bail I01. The springs II4 are fastened to the selector bars II 2 near their center and to the angle piece 5 which is rigidly connected to bar I20 by means of the brackets I 96. Each selector bar I I2 has an upward extending and turned over portion II2 for controlling the downward movement of its associated push bar III. Each push bar III has an elongated opening I24 through which the bar I23 extends and a downward extending arm to which its individual restoring spring H6 is attached. The front end of each push bar I II curves down and has a triangular notch therein in which the point of the push bar bail I09 enters to operate and hold the push bar. The rear end of each push bar III is provided with a hard rubber bushing I31 for controlling springs, a lever for operating keys of a typewriter, or other apparatus as the case may be. The elongated holes I 24 in each push bar 7 III are provided. to allow longitudinal as well as lateral movement of the push bars. in the slots in bar I20. Each push bar III is held by its individual spring I'I 6 against the rod I23 and against the turned edge H2 of its associated selector bar I I2 as'shown in Figs. 5 and 6. However, when-certain notches in the code bars H3 are in alinement one of the selector bars H2 is pulled into these alined notches by its individual spring H4 when the selector bar bail I01 is lowered by shaft I5. The edge H2 on this particular selector bar pulls the associated push bar III down a. sufllcient distance, as shown in Fig. 6, to permit the bail I08 to engage the notch in the push bar and operate the same when the push bar bail I08 is operated, as shown in Fig. 7.

The end pieces 80 and I09 have slots therein in which the code bars H3 move longitudinally. The code bars I I3, as is well known, have notches I32 therein which are alined for different codes dependent upon the combination of code bars actuated. Notches I 32 are so arranged on the code bars H3 that for each different combination of actuated code bars H3 a different series of notches are in alinement for allowing different selector bars H2 to drop in such alined notches when the bail it! is lowered. A combed guide piece 82 extending longitudinally between the code bars 6 It is provided so that the selector bars H2 and push bars l Ii i will be maintained in their properv positions with respect to the notches in the code bars i it. Each code her i I3 has an individual spring ltd normally tensloned to move the bar to the right so that a raised portion on the bar rests against the stop piece E35 mounted on pier/e its (Fig. 2) when the code bar is in actuated position. Each code bar lit has a notch I30 by means of which the code bar ball 83 moves and holds the code bars M3 to the left (Fig. 8) when the roller 35 is on the high part of cam 02. Each. code bar H3 has a notch iti in its upper left-hand edge in which its individual latch l0 drops when the code bar ball 83 has moved to the left and'when the corresponding feeler pin 69 is not extending through shown in Fig. 8 and then only in case the lugs m on feeler pins as have'not raised the latches l0 due to the feeler pins extending through the tape. A plate 8I' mounted on piece 99 allows longitudinal movement of the code bars in the slots in piece 80 while preventing vertical movement thereof. A bar H9 extending across the top of the selector bars H2 is secured to the endv pieces 80 and I09 by machine screws. End brackets H6 and Ill secured to the end pieces M9 and 80, respectively, by machine screws are provided to enable the upper spring assemblies on bar H8 to be mounted thereon. The lower spring assemblies on bar I22 are mounted on the support I2I and a similar support at the other end of the translator. v

The selection head assembly comprises a box shaped frame 54 made from a punched blank in which the sides have been bent at right angles to the front side which is attached to the end piece 80 by machine screws. The two bent sides of frame 54 have lugs 38' extending upward therefrom to which a portion 54', bent at right angles to the front side, is welded to form a top for the frame 54. Feeler pin holes are drilled through this top portion 54' to guide the feeler pins 69. The ears 38 are also bent from the front side of frame 54 and provide bearing supports having holes inwhich the tape feed wheel 36 and left-hand extensions 60. The cam follower 64 and associated bail lever BI both rotate on the rod 59 which extends through holes in the lower side portions of frame 54. A rod is riveted to the right-hand side of frame 54 on which both the pawl actuating lever 49 and cam controlled tape feed lever ,48 rotate. The pawl 43 is pivoted on lever 49 and is normally held by a spring against the teeth 40 cut in the tape wheel 36. An adjusting nut and screw assembly is provided for adjusting the stroke of pawl 43 with respect to the am actuated tape feed lever 48. A spring 5| is normally tensioned to rotate lever 49 on the rod to raise the pawl 43 whenever the lever 48 is raised by the connecting link 4! connecting the lever id to the feed cam follower assembly which is operated by the tape feed cam l I. The spring 5i likewise holds the roller 'II in engagement with cam H at alltimes. 45! is adjustably mounted on the side of frame 53 and the detent is set to rest in between teeth 49 in order to properly aline the star wheel sprock= ets 39 of the tape wheel 36 so that the tape is always positioned in its stop positions with --the perforations in the tape directly over the feeler pin holes in top 55'. A spring d3 fastened to one end of detent lever H normally holds the detent between two adjacent teeth ill on the tape wheel 36. The other end of spring 55 is fastened to a bracket 52 on frame 54. A iJ- shaped end plate 53 fastened to both sides of frame M is provided with holes through which the individual feeler pin springs 56 extend. A comb connected to both sides of frame 5 3 is provided with a slot for each feeler pin E59 and each spring 56 to act as guides therefor. The earn follower (it has a. roller always resting against the surface of the feeler pin cam ill and the adjusting nut and screw 63 maintains the proper relation between the bail lever 6i and cam follower Two levers 66 rotatably fastened at 52 to the two turned up ears on'bail lever 65 are also rotatably fastened to a U-shaped bail E26 which is pivoted at E21 in the frame 5d. The free end of bail 5.2T (shown in cross-section in Fig. 8) rests in the cut-out notches I29 in each of the feeler pins 69. Springs 67 are of sufilcient strength to overcome the tension of springs 56 with the result that spring 61 always maintains the roller 65 in engagement with cam it. The ball E25 holds the feeler pins 69 down below the tape when roller I55 is on the low surface of cam i0 and when the cam I0 raises the bail I26 the feeler pins 6%, due to the tension of their individual springs 56, either engage the tapeor pass through a perforation therein as the case may be. Due to the curvature of the cam I0 the pins 69 are gradually raised to prevent the pins 69 from perforating the tape if no hole is encountered. Each feeler pin 69 has a lug Hit which raises its corresponding latch I0 whenever The latches ID rotate on a rod I3 extending between the two sides of frame 54. Spacing wash- The detent lever ers 14 hold the latches 10 in the proper positions on the rod 13. Each latch 16 has an individual spring 12, slightly weaker than spring 66, which cause the latches to enter the notch I31 when the feeler pins 69 are down. The'latch springs 12 are connected to rod 1i extending between the two sides of frame 54.

A tape cover 26, rotatably mounted ona rod 3I extending through plate 30, has a grooved portion indicated at 32, and holes 33 for guiding the feeler'pins 69. A slot 34 in cover 28 allows the star wheel sprockets 39 of tape wheel 36 to rotate without interference. The cover catch 21 rotatably mounted on rod 35 isnormally held in the position shown in Figs. 1 and 2 by the spring 29.

The novel spring assembly shown mounted on bar I22 in Figs. 5 and 7 is shown and claimed in a copending application 8. N. 65,805 filed February 26, 1936, and will now be described in detail. The spring assembly comprises a plurality of similar shaped springs 269,268, 254, 253, and 252 separated by insulators 241. Each spring, such as springs 269 or. 262, is bent at an angle, as indicated at 239. The upper portion of each such spring as shown in Fig. 5A is split in the middle in order for each spring to make two rubbing contacts with its associated tooth 245 on top piece .296. Each spring has two holes through which raised portions of the insulators 241 extend and each insulator has two holes in the center of the raised portions through which the machine screws pass for securing the assembly to bar I22. Due to the raised; portions of the insulators 241-the assembly is insulated from the screws 238 and bar I22. An insulator 241 separates the back stop 246 from bar I22 and next to this back stop 246 is mounted the flat spring 289 which is soldered or otherwise rigidly secured to the top piece 290. Teeth 245 on the top piece 290 are provided so that the two split end sections 239 of the springs make rub'bing contacts with the left-hand surfaces of such teeth. A lug 236 on the left end of top piece 290 extends through a hole in spring 234 which acts as a support for the piece 296. The hole in spring 234 -is large enough to prevent buckling of springs 234 and 289 when the top piece 290 is moved to the left. Spring 235, separated by an insulator 241 is mounted next to spring 289 after which the springs 25I, 252, 253, 254, etc., separated by insulators 241, are mounted. The spring 234, separated by insulator 241, is mounted next to spring 269. A metal plate 231 is mounted to the left of the last insulator 241 and together with the screws 238 holds the assembly to bar I22. Due to this spring assembly a large number of multiple circuits can be closed simultaneously with a small spring assembly. In addition, due to the rubbing action of the slotted ends 239 of the springs on teeth 245, a good contact is ensured as well as continuously being .cleaned by the rubbing action. The spring assemblies shown in Fig. 3 are similar to the spring assembly shown in Figs. 5.and '7, there being an upper set mounted on bar H8 in the same manner as shown for mounting the set of Fig. 5 to bar I 22. These upper and lower sets of springs are alternately spaced as shown in Fig. 2.

Fig. 9 shows a portion of the perforated tape for controlling the translator to operate an electric sign. -The tape has perforation spaces for six perforations in each vertical column. As

shown in the drawings the first perforation is a.

start perforation for controlling the mechanism of the translator to operate the push bar which spam-i4 controls the start spring assembly 243 and 244 shown in Fig. 10. The succeeding perforations designate the letters SIGNS followed by a stop perforation indicating the end of a word. Each combination of perforations in the vertical columns control the selections of the corresponding push bars so that the proper spring assemblies are operated by the translator. As shown, about ten or more spaces are left between words after which a start perforation precedes the next word perforations, in this case the word Display.

Fig. 10 shows the start andstop push bars III with their associated spring and circuit connections. Only two other push bars have been shown which correspond to the characters A and L with their associated spring and circuit connections. The remaining push bars corresponding to the remaining characters control spring combinations and circuit connections somewhat similar to the circuit" connections controlled by the push bars for characters A and L. The two cams 8 and 8 on the cam shaft 1 are shown controlling the springs I40 and HI and the circuits therefor. A start key SK and a stop key SP are shown for controlling relay 246 which in turn controls the stop magnet 25 of the translator. A motor and an electric centrifugal governor for controlling the translator is also shown and is connected for operation by 'the switch K.

Fig. 11 shows a sequence switch SQ having two sets of bank contacts and associated wipers 336 and 336 which are advanced a step in response to each deenergization of motor magnet 334. The restoring wiper 335 and associated multipled bank 'is provided for restoring the switch wipers 336 and 336 to normal position or the position shown.

Wiper 336 is provided for successively operating the frame connecting-relays individual to the successive sign frames. Lock relay 338 has a pair of sumed that there are ten sign frames. Relays In this particular disclosure it is as- 35I and 3H are individual to the first sign frame I and show the manner in which the control circuits are connected; Relays 352 and 312 are individual to the second sign frameand connect the control circuits to the second frame (shown dotted) in a similar manner. The connecting relays for sign frames 3, 4, 5, 6, 1, 8, and 9 are not shown, since the circuits they control are similar to the circuits controlled by the connecting relays for the first. sign frame. The connecting relays 366 and 388 of the tenth sign frame are also shown. While only nine conductors are Each sign pins 09 have closed contacts which in their closed positions normally short out a neon section of the character sign box shown in Fig. 13.

There are ten character sign boxes such as shown in Fig. 13. Each sign comprises a series of 33 neon tube sections connected in series as shown with the secondary of the transformer connected by conductors 430 and 435 to the two end sections numbered 1 and 33, respectively. The #1 neon section is normally short-circuited in the manner illustrated by conductors 431 and 438 and the upper contacts of #1 A. C. relay. The remaining neon sections are shorted in a similar manner by contacts on correspondingly numbered relays. Only the sections which have had their short circuits removed by relay operation light when current is passed through the sign to form the different desired characters.

The mechanical operation of the tape translator will now be'described in detail. In re-' sponse to the closure of switch K the motor ro-. tates the drive shaft I! and gear I8 which meshes with gear I9 to rotate the clutch 20. Since the stop magnet 25 is not energized at this time, the pawl 22 is in the position shown in Fig. 4 with the result that cam shaft I does not at this time rotate. After the tape is positioned under the cover 28 in the selection head assembly the start key SK (Fig. 10) may be pressed. In response to the operation of start key SK an obvious circult is closed for energizing relay\240 which at its upper armature completes a locking circuit for itself from ground through the stop key SP. At its lower armature relay 240 completes the circuit for energizing stop magnet 25. Magnet 25 operates its armature 24 thereby releasing the pawl 22 and arm 23. Spring 22 causes the pawl 22 to engage in one of the teeth 2| of clutch 20,

thereby causing the cam shaft 1 to rotate with clutch 20.

At the start of the selecting position the feeler pins '59 are in their lower non-selecting position due to the roller 65 on cam follower 64 engaging the low surface of cam I0; the code bars H3 are held in non-operated position by code bar ball 83 due to the roller on cam follower 84 engaging the high surface of cam I2; the pawl 43 is starting on its restoring stroke due to-the roller I'I engaging the raising surface between the low and high surfaces of cam I I; the selector bars H2 are in their raised positions due to the selector bar bail I01 being in its raised position on account of the roller 98 on levers 81 engaging the high surface of cam I4, as shown in Fig. '7; the push bar bail I08 is in "its forward operated position due to the roller engaging the high surface on cam I3 and-in case a push bar III had\ been selected by a previous selection such-\push bar will be in its operated position, as shown in Fig. 'I'; and the springs I40 and Ill are closed due to the insulating fibres I39 engaging the low surfaces on cams 8 and 9.

While the speed of rotation of cam shaft I may be varied due to adjustment of the governor it will be assumed, in order to clearly describe the timed operations, that cam shaft 1 completes one revolution every one-hunder milliseconds. Now

starting at selecting position as previously described, the time operation of the different parts will be given in millisecond periods. At the end of 15 milliseconds the fibres I39 engage the low surfaces of the cams 8 and 8 to close springs I00 and Ill. Atthe end of 20 milliseconds the feeler been gradually raised to encounter the tape or to pass through a perforation therein due to the gradually raising surface of cam l0 raising the cam follower 64 and bail I26 as shown in Fig. 8. Only thefeeler pins-69 which pass through perforations in the tape raise their individuallatches I0 by means of the lugs I28 in the feeler pins. Between the 20 and 30 milliseconds periods the code bar cam i2 is lowering the cam follower 84 and hail 83, as shown in Fig. 8, so that at the end of 30 milliseconds those code bars H3, having their individual latches I0 removed from the notches I3I by their associated feeler pins passing through perforations, are free to be moved to the right by their individual springs I33. Latches '10 which have not been raised by their associated feeler pins 69 now hold the corresponding code bars H3 from longitudinal movement to the right. During the next 20 millisecends, or between the 30 and 50 millisecond periods, the feeler pins 69 are lowered by roller 65 engaging the sloping surface of cam I0, thereby causing the bail I26 to engage the notches I29 in the feeler pins 69 and gradually lower the pins. The feeler pins 69 remain in their lower positions until thestart of the next revolution of cam shaft I08 to its tin-operated position as shown in Fig. 5.

At approximately the 30 millisecond period the bail I08 is restored a sufficient distance to release the operated push bar III so that its individual spring H6 will restore the push bar ill to the position shown in Fig. 5 against the lug H2 on the associated selector bar H2. Starting at approximately the 35 millisecond period the selector bar bail W1 is gradually lowered by cam I4 and reaches its lowermost position as shown in Fig. 6 at about the 50 millisecond period. The lugs I I2 on the selector bars I I2 cause their corresponding push bars III to be lowered with the selector bars. Since the code bars H3 are operated at this time certain notches in all the code bars are selector bars H2 enters into these alined notches and in so doing lowers the curved end of its associated push bar III so that the notch therein is in the path of the oscillating push bar bail I08. The remaining selector bars H2 which have not dropped into the alined notches in the code bars H3 are resting on the upper edges of such code bars and therefore do not lower their associated push bars in the path of the oscillating bail I03. Due to the curvature of cam I4 the bail I08 is started in its forward oscillating movement at about the 50 millisecond period. At approximately the 60 millisecond period, the point on the push bar bail I08 enters the triangular notch on the selected or lowered push bar III and thereafter pushes the push bar to the left as shown in .Fig. 7 to operate the spring assembly shown. This selected push bar is now held operated by bail I08 until the 30 millisecond period is reached on the next rotation of cam shaft I.

The selector bar bail I0'I is maintained in its lowermost position until the 60 millisecond period is reached at which time the cam I4 raises the bail I01 and selector bars I I2. The bail is held in raised position until about the 35 millisecond pe- The tape feed cam II operates pawl 43 in its upward stroke at approximately the 80 millisecond period thereby rotating the star wheel 36 to positionthe tape for the next selection. Springs I40 are held open by cam 3 from the 15th to the 45th millisecond period and springs I are held open by cam 9 from the 15th to the th millisecond period.

The translator operates in the manner de,-

scribed until the stop key SP is operated to open the locking circuit of relay 240, which, upon deenergizing, opens the circuit of stop magnet 25. Magnet 25, upon deenergizing, releases its armature 24 in the path of the pawl 26 and arm 23, thereby causing the pawl 22 to be disengaged from the teeth 2I of clutch 20. Arm 23 prevents further rotation of cam shaft 1.

From the foregoing it can therefore be seen that the greater part of a cycle period of operation is'used in the selection of the proper push bar which does not interfere with the operated condition of the previously selected push .bar which is held operated for'a time equal to a greater part of a single cycle period of operation. It can also be seen that just as soon as one of the push bars is held operated by the push bar bail the selector bars, code bars, and all other selecting mechanisms may be restored and reset for a new selection without interfering with the then operated push bar.

Having described the mechanical operation of the tape translator a description will now be given of the manner in which the sign circuits are operated to display words and other characters. The tape, such as shown in Fig. 9, is advanced one step for each cycle period of operation or revolution as previously described. Since the first perforation encountered by the feeler pins of the translator is a start perforation, as shown in Fig. 9,'the #1 feeler pin 69 is raised to operate its associated code bar latch 10, thereby allowing the #1 code bar H3 to move longitudinally when bail 83 operates. The movement of this code bar alines certain notches I32 in all the code bars #1 to #6, inclusive, to allow only the #36 selector bar II2 and its associated start or #36 push bar II! to be selected. When the selector bar bail I01 is lowered only the #36 selector bar H2 enters the alined notches I32.

For convenience in describing the operation it will be assumed that the feeler pins 69 and code bars H3 shown in Fig. 2 are designated consecutively #1 to #6, from top to bottom, and that the selector bars H2 andtheir associated push bars Iii are designated consecutively #1 to #38 from left to right.

Push bar bail Hi3 now operates in the manner set forth to operate the #36 push bar III, thereby operating springs 243 and 244, shown in Fig. 10. At springs 243 and its break contact, ground is disconnected from conductor 291 and at the make contact of spring 243 ground is connected to conductor 29I to energize control relay 340 and transformer relay 339 by way of switch 331 in flash position. In response to the closure of springs 244 ground is connected to'conductor 293 to prepare a circuit for energizing lock relay 333 as soon as relay 340 closes its armature 343. Re-

resting contact opens the circuit extending to wiper 335 and at its working contact prepares a point in the circuit for motor magnet 334. At armature 342 relay 340 prepares another point in the circuit for motor magnet 334, at armature 343 connects the grounded conductor 293 to the winding of lock relay 330 for energizing the latter relay, and at armature 344 completes a locking circuit for itself as well as completing a circuit for maintaining relay 339 in energized position as follows: from ground by way of springs 242 and its break contact, conductor 292, armature 344, through the winding of 340 to battery, and over another branch including switch 331 in flash position and through the winding of transformer relay 339' to battery. Transformer relay 339, upon energizing, operates its ten armatures, one for each sign frame, to disconnect one terminal of the A. C. source from the ten conductors 46I, 462-410. In case some word was on display at the time relay 339 is operatedthe operation of this relay at its armature disconnects the A. C. source from the sign frame to wipe out the display. Relay 338, upon energizing, operates its ten armatures to disconnect one terminal of the A. C. source from the ten conductors 45I, 452-460 to unlock any A. C. relay which may at this time be energized.

During the time thestart push bar #36 is being selected, or between the 15th and 45th milliseconds period, as previously described, springs I40 are opened by cam 8 and are reclosed shortly before the push bar bail I08 engages and operates the selected start push bar #36. Springs III, which have been operated by cam 9 during the selecting" period, are reclosed at about the time that the selector bar bail I01 reaches its highest position, or approximately at the 75 millisecond period. As previously described, the push bar III, in this case push bar #36, is held operated until about the 30 millisecond period of the next cycle of operation, or revolution, at which time it is released from the push bar bail I08. This is at a time when the feeler pins 69 have been operated for the succeeding selection. The release of start push bar #36 also releases the springs 243 and 244. The restoration of springs 244 opens the circuit of lock relay 338 which thereupon deenergizes to connect one side of the source of A. C. current to conductors 45I, 452-460. The restoration of springs 243 at its make contact opens the original energizing circuit of relays 340 and 339, which relays, however, are maintained energized over grounded conductor 292 as previously described. At the break contact of spring 243 the following circuit is completed for motor magnet 334 when springs I40 are again closed. From grounded springs 243 and its break contact,

springs 24I, conductor 291, armature SH and working contact, conductor 296, springs I 40 now closed by cam 8, conductor 294, and through the winding of motor magnet 334 to battery. A branch of'this circuit may be traced for ener- 'gizing frame connecting relay 31I as follows:

from ground at spring 243 over the previously traced circuit to conductor 294 and thence by way of armature 342, wiper 336 in engagement with its first bank contact, and through the winding of relay 31| to battery. Motor magnet 334, upon energizing, positions its pawl preparatory to stepping the wipers of the switch SQ and near the end of its stroke operates its interrupter springs shown to the right thereof. Frame connecting relay 31I, upon energizing, connects the thirty-three common conductors 2" to 233,

inclusive, to the thirty-three A. C. relays l to 33, in Fig. 12, by way of armatures "I to 333, inclusive, and conductors 40! to 433. inclusive.

Assuming now'that character A push bar, or in this case push bar #1, has been selected, as previously described, during the second revolution. and the push bar bail at approximately the millisecond period in the second revolution operates its associated spring combination to pre-' pare circuits for the A. C. relays in the first sign frame shown in Fig. 12. About the 75 millisecond period of the second revolution springs I, are closed bycam 9 to close circuits through the character A springs for the A. C. relays in the first sign frame. In this particular case in order to form the letter A, A. C. relays 8, 30, and 3| are energized in Fig. 12. The circuit for energizing A. C. relay 3 in Fig. 12 may be traced as follows: from one terminal of the A. C. source through springs I now closed, conductor 248, spring 249, top piece 250, springs 258, conductor 208, armature 308, conductor 408, through the winding of relay 3, conductor 298, through switch K to the other terminal of the A. C. source. The circuit for energizing A. C. relay 30 in Fig. 12 maybe traced from conductor 248, spring 249, top piece 258,

springs 280, conductor 230, spring sec, conductor.

430, through the winding of relay 3t in Fig. 12, to conductor 298 and the other terminal of the A. C. source. The circuit for energizing A. C. re-= lay 3 i in Fig. 12 may be traced as follows: from one terminal of the A. C. source, over the previously traced circuit to top piece 253 and from thence by way of spring 28!, conductor 23d, armature 33!, conductor 33!, through the winding of A. C. relay St to conductor 2% and the other terminal of the A. C. source. Relays 8, 3d, and ill energize over the above traced circuit and at their lower armatures complete locking circuits for them selves by way of conductor A55 through the nor mally closed armature on relay 338, which at this time is deenergized in response to the restora tion of the star push bar #36. 'At the upper ar-= matures of relays 8, 35, and 35 the short circuit from around the neon tube sections &3, and Bi are removed. At about the Si) millisecond period the tape is stepped for the next selection and at the 15th millisecond period on the third revolution springs it! and spring ltd opened by cams l and At springs NB the original energizing circuit of relays 8, 3t, and are opened but these relays are now held energised over their locking circuits. Springs i lll open the circuit oi motor magnet 33d and relay 3H the result that motor magnet 33% and relay 3W deenergize.

The deencrgization of frame connecting relay disconnects the common conductors 2M to 233, inclusive, from the first sign frame. The deenergization of motor magnet 334 releases the post tioned pawl to cause the wipers of the switch SQ to he stepped into engagement with their second bank contacts.

In the same manner as described, the character perforations for the second letter, assuming it to the second frame connecting relay 312 to battery. Motor magnet 3.34 likewise energizes from ground on conductor 234 with the result that the stepping pawl is against positioned preparatory to stepping the wipers 335 and 338. At the upper armatures of relay 312' the common conductors 2! to 233, inclusive, are connected to the A. C. relays in the second sign frame. Relay 312 at its lower armature completes a circuit for energizing the'power connecting relay 35l individual to the first sign frame, as follows: from one terminal of the A. C. source, through the lower armature of relay 312, through the winding of relay 35!, conductor 298, switch K to the other terminal of the A. C. source. At its upper armature relay 35! completes a looking circuit for itself over conductor 45l and through the normally closed armature on relay 338 to the A. C. source. At its lower armature relay 35l prepares a circuit for connecting the A. C. source to the lower terminal of the primary winding of the transformer T in Fig. 12.

When springs I again close circuits are com= pleted for energizing the A. C. relays in the second frame, or the relays ,l, 2, 3, 4, l8, and 19 therein. The circuit for the #1 A. C. relay in the second frame may be traced as follows: from one terminal of the A. C. source through springs Ml, conductor 248, spring 289. top piece 298, spring 25W, conductor 20!, the upper armature of relay 312 and over a conductorsimilar to conductor dill to the #1 A. C. relays in the second frame, and thence by way of conductor through the key K to the other terminal of the A. C. source. The A. C. relay 2 in the second frame is energized over similar circuits extending from top piece 290 by way of spring 252 and conductor 232. In a. similar manner A. C. relays 3, t, l8, and is in the second sign frame are energiaed over circuits controlled by springs 253, 25 i, 238, and 268. The operated A. C. relays in the second frame lock energized over their lower ar matures over conductor 352, through the second normally closed spring on relay 338 to the A. C. source. .When springs Mo and ME again open, at approximately the 15 millisecond period in the fourth revolution, the A. C. relays in the second frame are maintained energized over their locking circuit when relay 312 deenergizes in response to the opening of springs Md. The operated A. C. relays in the second frame at their upper armatures remove the correspondingly numbered short circuits from around that neon tube section to prepare the neon sign to display the letter L, in a manner similar to that described for the letter A.

Motor magnet 334 deenergizes in response to the op'ning of springs ME to step the Wipers 335 and 33B of the switch SQ into engagement with their third bank contacts.

In the same manner as just described the remaining letters of the word are prepared for display in each succeeding sign frame until the stop perforation in the tape indicates the end of the word. When springs I40 close on the stop revolu tion, the corresponding frame connecting relay, such as relay 312 or 380, dependent upon the position of wiper 336, is energized to in turn energize the preceding power connecting relays, such as relays 352 or 360. The lower connecting relay then locks in the manner similar to that pre* ,viously described and prepares the power circuit to the transformer of its associated sign frame through its lower armature, as previously described. In case all of the sign frames are to be used for a word, then relay 38l is energized in response to the stop revolution to operate power relay 362 individual to the last sign frame.

When the stop pushbar #38 is operated by bail I08. springs 24l and 242 are operated. At springs F 242 and its break contact the lockingcircuits of relays 339 and 340 are opened with the result that these relays now deenergize.

At springs 24l the circuits of themotor magnet 334 and the last operated frame connecting relay is opened, but the closure of springs 242 at its make contact maintains the last operated frame connecting relay in operated position in response tothe grounding of conductor 295. Relay 340,

upon deenergizing, at armature 341 prepares a circuit for restoring the wipers of switch SQ to normal position; at armature 342 disconnects motor magnet 334 from grounded conductor 295, thereby deenergizlng the magnet; at armature 343 opens a point in the circuit for relay 338, and

at armature 344 opens a point in its own locking circuit and the circuit -of relay 339. Relay 339, upon deenergizing, at its right-hand springs connects one terminal of the A. C. source to the lower terminals of the primary windings of transformers T in each sign frame by way of the lower armatures of the operated'power connecting relays to cause the display of the word set up. The circuit for the primary winding of transformer T in the first sign frame isas follows: from one terminal of the A. C. source, through the lefthand normally closed springs of relay 339, conductor 4H, lower armature of A. C. relay 35l,-

conductor 48!, through the primary winding of the transformer T to conductor 298, and thence by way of key K to the other terminal of the A. C. source. winding of the transformer in the second sign frame is as follows: from one terminal of the A. C. source, through the second armature of relay 339, conductor 462, lower armature of the A. C. power connecting relay 352, over a conductor similar to conductor 48!, through the primary winding of the transformer in the second sign frame to conductor 298, and thence through the key K to the other terminal of the A. C. source. In a similar manner the circuits for the transformers in the sign frames having their-individual power connecting-relays operated are completed through the armatures of relay 339.

Since the A. C. relays 8, 30, and 31 in the first sign frame shown in Fig. 12 are energized at this time, a circuit is completed through the secondary winding of transformer T for illuminating the neon sections 8, 30, and 3lto display the letter A on this sign frame as follows: from the lower terminal of the secondary winding of transformer T, conductor 436, over the short circuit including conductor 438, the upper armature of #1 A. C. relay, conductor 431, to the upper.

terminal of the #1 neon section, thereby shorting this section. The circuit continues from the upper terminal of the #1 neon section over a similar short circuit including the normally closed armature on the #2 A. C. relay. Neon sections 3, 4, 5, 6, and I are short circuited in a similar mannerby the upper armatures of the correspondingly numbered relays. continues from thelower left-hand terminal of neon tube sections 8, and in this case, since the #8 A. C. relay is energized, the short circuit around the #8 sections is removed with the result that these sections are included in the display circuit. The circuit continues from the lower right-hand terminal of section 8 over similarly described short circuits of sections 9 to A similar circuit for the primary The circuit the first sign frame are illuminated while the remaining sections are-dark with the result that the letter A is displayed in the first sign frame. The neon tube sections in the second sign frame are illuminated in a similar manner to display the letter L since the A. C. relays l, 2, 3, 4, l8, and 19 have been energized to remove the short circuits from the corresponding neon sections. In a similar manner the remaining sign frames are illuminated to display the letter corresponding to the combination of individually operated A. C. relays in such sign frames.

In. order to show how all the different characters are'to be displayed on the sign the following chart has been prepared which shows in the first vertical column the character selected for display. The second vertical column indicates the coded perforations in the tape .in Fig. 9, and the corresponding code bars actuated for such characters. particular selector bar and its associated push bar which are actuated for a given character. The fourth column indicates the A. C. relays, such as shown in Fig. 12, which are operated to remove the short circuits from the corresponding neon sections to cause the display of the corresponding character shown in the first vertical column. A

Chub Cooldolzmd bselecttor R 1 0 cars aracuen'sinsinf act" actuated 3 g tame operatedt .2. a W

Start 1 30 Stop 2 38 when stop push bar #38 isrestored springs 24! and 242 also restore. Spring 242 at its make contact opens the circuit to the last operated frame connecting relay, such as relay 312 or I.

The third vertical column indicates the I I played on successive sign frames when the s The closure of springs!" completes a circuit for energizingthe motor magnet 33! as follows: from grounded spring 243 and its break contact, springs 2H, conductor 291, armature 3H and 5 resting contact, wiper 3351in engagement with one of its multiple bank contacts. through the interrupter springs or motor magnet 333, and through the winding of magnet 33! to battery. Motor magnet 334 energizes ov'er theabove traced circuit to position its pawl preparatory to stepping-the wipers of the switch and near the end of its stroke operates its interrupter springs thereby opening its own circuit. Motor magnet 334 thereupon deenergizes and steps the wipers 335 and 336 into engagement with their "next bank contact and also closes its interrupter "springs. The same circuit for energizing motor magnet 334 is completed as long as wiper 335 engages the multiple bank contacts, with the result that motor magnet 33 operates intermittently to step the wipers until wiper 335 engages its first bank contact at which point the circuit to motor magnet 334 is-o'pened. Wipers 335 and 335 are double-ended wipers which, upon stepping from their last bank contacts, engage their first bank contacts.

The tape translator continues to step the tape one step per revolution, and since a number of blank spaces are provided between word perforations, the illuminated word will he displayed until such time as the start push bar #36 is again operated at the start of the next word.

As previously described the operation of springs Mil completes the circuit for relay 339 which thereupon energizes and disconnects the A. C. source from the lower terminals of the primary windings oi the transformers, thereby wiping out the display. The operation of springs 2% again causes the energization of lock relay 338 which opens the locking circuits of the operated A. C. relays individual to the sign frames. The A. C. relays now deenergize and are in position to he operated in preparation for the next display. The next word is set up and displayed in the manner just described. Having described how a full word is displayed at a given time when the switch 32d, Fig. ll, is in its flash position, a brief description will be given of the circuit operations when the successive letters of a word are successively dis- Witch 33'l has been operated to spell position. Assum ing now that switch 331 is in spell position, then no circuit is completed for relay 339 when the start springs 213 are operated by start push bar #36. In this case, since relay 338 is not energized, the-letter for the first sign frame is displayed in response to the operation of relay 3M which at its lower armature completes the circuit for the A. CQpower connecting relay 3M of the first sign frame, it being remembered that relay 312 energized during the revolution which selects the second letter of the word. In a similar manner each succeeding frame connecting relay operatesthe preceding power connecting relay in the same manner as relay 3'52 operates the A. C. power connecting relay 35L Each power connecting relay renders its associated trans former active to cause the illumination of a letter corresponding to the operated A. C. relays in its sign frame. After the letters are illuminated the same are maintained in this condition until relay 338 is energized at the start of the next word selection, whereupon the operated A. G. relays individual to the sign frame deenergize in the manner previously described. In order to stop selector bars and displaced in the mechanical operations of the translator the stop key SP is operated to open the locking circuit of relay m which in turn opens the circuit of the stop magnet 25. The stop magnet 25, upon deenergizing, restores stop armature 2 4 in 5 the path of the rotating arm 23 and pawl 22 with the result that the pawl is withdrawn from teeth 2i of clutch 20 when the pawl strikes the stop armature 2t. Further rotation of the cam shaft '5 is now prevented by the engagement of the arm 10 23 on top of the stop armature 24. In order to stop the motor, switch K is operated to the position shown in Fig. 10.

This tape translator may be used wherever translation is required from a perforated tape. 15

For example, the electric sign circuits shown in application Ser. No. 634,139 of M. L. Nelson filed September 21,1932 may be controlled by this tape translator. In this example the push bars of the translator would operate springs connected 20 in multiple with the springs controlled by the character keys shown in Fig. In this case no start perioration is used in the tape because none is needed. A display perforation and display push bar, however, are needed, and this perforation 25 and push bar would correspond to the stop perioration and stop push bar in the instant application. The push bar of the translator may also operate bell crank levers which in turn operate the keys oi? a typewriter or other recording ma- 30 chines.

Having described the invention what is con-. sidered to be new is pointed out in the appended claims. I

What is claimed is:

i. In a tape translator, a perforated tape, code hars, means for moving said bars in a relative longitudinal motion, selecting mechanism for selooting particular ones of said code bars for operation by said means in accordance with perform 40 tions in said tape, selector bars cooperating with said code bars, means for engaging said selector hars with said code bars and for disengaging said selector bars from said code bars, means for operating said selector bars in accordance with the 45 particular operatedones of said code bars in response to the engagement of said selector cars with said code bars, push bars engaged by said response to the operation oi said selector bars, common operat 59 ing means for then operating the displaced push bars and for thereafter holding the operated push bars independently of the code bars, the selecting mechanism and the selector bars, means for re storing said code bars, and a rotating shalt hav- 55 lng means for controlling said selecting mechanism, the longitudinal and restoring movements of said selected code bars, the engaging and disengaging means, and the common operating means. 60 2. In a tape translator, a plurality of code bars capable of longitudinal movement, a common means normally holding said code bars from 1ongitudlnal movement, a tape having perforations therein, a selecting pin for each code bar, a latch 65 for each code bar and selecting pin, a notch in each code bar, a projection on. each latch normally in engagement with the notch of. its corresponding code bar to lock the code bars against longitudinal movement, means for operating said 70 selecting pins to search for perforations in the tape, means on each selecting pin for operating its associated latch only in case such pin extends through a perforation in the tape to remove the latch projection from its code bar thereby un- 7 looking such code bar, means for operating said movement of the unlocked code bars having their individual latches operated by the selecting pins, the unoperated latches thereafter restraining the locked code bars from longitudinal movement, and means cooperating with said code bars for making a selection in accordance with the operated ones of said code bars.

3. In a tape translator, a plurality of selector bars, code bars movable in combinations to select a different one of said selector bars for each different combination, a selecting pin individual to each code bar, a perforated tape, means for moving said selectingpins into engagement with said tape and for actuating the selecting pin engaging perforations in the tape, means for operating the code bars corresponding to the actuated selecting pins, means common to said selector bars for operating only the selector bar selected by the combinational operation of said code bars,

a push bar individual to each selector bar, means for displacing only the push bar individual to the operated selector bar in response to the operation of said selector bar, means common to said push bars for actuating only the displaced push bar, and means for restoring the operated selector bar, the code bars and selecting pins while leaving said push bar in displaced and actuated position.

4. In a tape translator, a plurality of code bars movable in selective combinations, springs for individually moving said bars to their selected position, a common bail for restoring and holding said bars in their unselected position, individual selecting means for each code bar, means includinga perforated tape for operating the individual selecting means in accordance with the perforations in the tape, a latch individual to each code bar, a notch in each code bar, a projection on "each latch normally in engagement with the notch of its corresponding code bar to lock the code bar against movement, a lug on each operated individual selecting means, for operating its corresponding latch to re'move its projection out of its corresponding code bar notch to unlock its corresponding code bar, means for operating said bail to permit movement of the unlocked code bars to their selected positions, the projections on the unoperated latches and the corresponding code bar notches thereafter restraining only the code bars corresponding to the unoperated individual selecting means in their unselected positions.

5. In a tape translator, the combination of selector bars having straight continuous edges, notched code bars having notches cooperating with the straight edges of said selector bars,

means for moving said code bars in combinations to select said selector bars, means for operating the selected selector bars, a push bar individual to each selector bar, means on each selector bar for displacing its individual push bar in responseto the operation of said selector bars, a common means for operating only said displaced push bars independent of said selector bars, said common means thereafter holding and subsequently restoring the operated push bars, means for restoring said code bars and said selector bars and for reoperating said code bars prior to the restoration of said push bars.

6. A tape translator having successive cycles of operations, a plurality of selector bars, a plurality of code bars, each having notches arranged on its upper edge, means for selectively moving said code bars in combinations during each cycle of operation to bring said notches into or out of registry with the free ends of said selector bars, a push bar individual to each selector bar, means for moving said selector bars to engage said code bars during each cycle operation, means for displacing the push bar corresponding to the selector bar in registry 'with the notches in the operated code bars during each cycle operation, and a common means operated during each cycle operation for releasing the push bar operated on the preceding cycle operation and for operating the push bar displaced by the instant cycle operation, said common means holding the operated push bar in its operated position between cycle operations until said push bar is released on the subsequent cycle operation of said common means.

7. In a tape translator, code bars, selecting mechanism controlled by perforations in a tape for selecting particular ones of said code bars in combinations in accordance with the perforations in said tape, means for moving the selected code bars, selector bars oneof which is selected in response to the operation of said code bars, means for operating the selected selector bar, a push bar individual to each selector bar v and displaced thereby when the corresponding selector bar is operated, common operating means for operating only said displaced push bar, means for restoring said selector and code bars and for reoperating said selecting mechanism and code bars on a succeeding selection while the push bar displaced by the preceding selection is held by said common operating means, said last means also controlling said common operating means on each succeeding selection to release said previously displaced push bar prior to the operation of the last selected selector bar and to thereafter operate the push ba'r corresponding to the last operated selector bar before the restoration thereof.

MARTIN L. NELSON. LEI'I'H JOHNSTON.

and overlap 

